Diagnostic optical instrument



April 22, 1930. J. E. REID v DIAGNOSTIC OPTICAL INSTRUMENT Filed June 4, 1928 Il Il Illiu '.lijatented QS i www JAMES 1min,y or ivroonnsfrowlv, NEW JERSEY ,s DIAGNOSTIC 'OPTICAL rns'rjnunniv'r. l

`Application 'led June 4,

5 The principal object of thefpresent inven-yA tion is to provide for diverting the attention of a patient causing him to look steadily in the same direction thereby facilitating the use of the instrument in making the ldiagnosis.

. To these andother ends hereinafter Set forth the invention, generally stated, comprises a lantern structure projecting Afrom the wall of the stem of the instrument and it'adapted forfthe detachable reception of a transparency along with appropriate windows or openings in the wall of the stem structure operatively arranged in respect to the lamp of the instrument so that an illumi- 20 nated transparency vis presented` to the view of the patient and serves to attract his at-y tention and thus keep his eye steady.

' 'Ihe invention also comprises the improvements to be presently described and finally claimed. t Y.

In the accompanying ldrawing to 'which reference will be made Figure 1 is a side view principally in central section illustrating an instrument embodying features of the invention.

Fig. 2 is a similar view taken at right angles to Fig. l and yillustrating a part ofthe instrument.

Y Fig. Sis a front view ofthe 'instrument n with a part broken away, and

. Fig. 4 illustrates a detachable transparency which happens Ltobe adapted for use with children.. A

Inthe drawing l is thehollow tubular stem Y 19e-a', serial :.Nq.uaa2i,efi1`. Y l y l, l Vmounted lens holder by meansof whichl differ-r ent lenses can be lbrought'into,thejlineof vision'of the operator which isindicated fthe, brokenl line in Fig. '1.' ThereY isV nothing particularly new about the instrument so far 551` described.

9 is a flaring lantern structure projecting from the wall of the stem in the direction of reectionfrom the reflector, and it is, by means of the flange l0, adapted for thei de- V tachable reception 1 of a transparency 1l. There is a window or opening 12 in the stem and also a window or vopening v13 in the lens carrier, which assumes the form of an open ended slot, and these openings are arranged "opposite to and extend above the lamp so that light from it shines 'uponand illuminates the transparencyV ll.. To better illuminate the transparency the bottom portion of the wall of the lantern bulgesV from its normal flaring form which is indicated byV the dotted line in Fig. l.

`In use the operator is provided with a num*v ber of transparencies which hel shows one 'after another tothe patient and by attract- 'la ing the attention of the patient to the trans- 1 parencies is-ableto cause the patient to hold his eye steadily during diagnosis.

It will be obvious to those skilled in the art to whichV theinvention appertains that 8omodifications may be made in details of construction and arrangement and matters. of mere form without departing from the spirit ofthe invention which is not limited to such matters or otherwise than theprior art rand the appended claims may require.

I claim: I

l. In anfoptical diagnostic instrument a Y f hollowr tubular stem, a reflector at the upper part of the stem, a lamp mounted in the Stem, .90,

a lens and tubular `lens carrierl slidably mounted in the stembelow the reflector and above the lamp, a flaring lantern structure projecting from the wall ofthe stem in the direction of reflection from the reflector and j adapted for the reception of a transparency,

and windows in the wall of the stem and inv n the wall of the carrier arranged opposite and yk extending above the lamp and'aligned with said aringlantern structure.

2. An optical diagnostic instrumenthaving a stem, a reflector at the upper part of the stern, a lamp in the stem7 a lens and a tubular lens carrier, a lantern structure projecting from and forming part of the Wall of the stern and arranged at the front of the instrument to receive light from the lamp, and a transparency arranged at the end f the lantern Structure.,

a 3. An optical diagnostic instrunit havng'a stem, a reflector at the upper part of theV stem, a lamp in the stem, .a lens anda tubular lens carr1er, a flaring lantern structure-prim j ecting from and forming part of the Wall of the stem and having a bulged Wall at tle lower part therecf and Varranged .to receive light, fri the lainp, transparencies,A and iiea on the lantern Structure for detachalljf' reeiifig' the transparencies. ,Y

JAMES E. RED] 

